If three resistors of 1 Ohm each connect in parallel to each other the resultant resistance is

For resistors connected in parallel, the resultant resistance is given by 1/R = 1/R₁ + 1/R₂ + 1/R₃. With R₁ = R₂ = R₃ = 1 Ohm: 1/R = 1/1 + 1/1 + 1/1 = 3, so R = 1/3 Ohm. In general, when n equal resistors of resistance R are connected in parallel, the equivalent resistance is R/n. Here, R/n = 1/3 Ohm.